INCH-POUND
MIL-PRF-55310/21G
14 November 2008
SUPERSEDING
MIL-PRF-55310/21F
09 June 2008
PERFORMANCE SPECIFICATION SHEET
OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)),
1.0 MHz THROUGH 60.0 MHz, HERMETIC SEAL, SQUARE WAVE, TTL
This specification is approved for use by all Departments
and Agencies of the Department of Defense.
The requirements for acquiring the product described herein
shall consist of this specification sheet and MIL-PRF-55310.
FIGURE 1. Dimensions and configuration
.
AMSC N/A FSC 5955
MIL-PRF-55310/21G
Pin number Function
1-9 NC
10 B- (GND/CASE)
11 OUTPUT
12 NC
13 B+ (see note 5)
14-19 NC
20 B+ (optional)
(see note 5)
A --- .120 --- 3.05
b .010 .022 0.25 0.56
c .005 .015 0.13 0.38
D --- .650 --- 16.51
E --- .650 --- 16.51
e .045 .055 1.14 1.40
L 1.250 --- 31.75 --Q --- .060 --- 1.52
Inches mm Ltr
Min Max Min Max
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for general information only.
3. Unless otherwise specified, tolerances are ±.005 (0.13 mm) for three place decimals and ±.02 (0.5 mm) for
two place decimals.
4. The leads shall be symmetrical with respect to the package so that the spacing between the first lead and the
end of the package shall be equidistant on each side.
5. Unit shall meet all requirements with pin 13 and pin 20 simultaneously tied to supply voltage.
6. Lead numbers are for reference only and need not be marked on unit.
7. All pins with NC function may be connected internally and are not to be used as external tie points or
connectors.
FIGURE 1. Dimensions and configuration
.
REQUIREMENTS:
Interface and physical dimensions: See figure 1.
Mounting: See figure 1.
Pads: See figure 1.
Seal: Hermetic in accordance with MIL-PRF-55310
, maximum leakage rate 5 x 10
-8
atm cc/s.
Weight: 4 grams, maximum.
Oscillator: Class 2 or any class 1 or class 3 oscillator meeting all class 2 requirements and verification tests
specified herein and in MIL-PRF-55310
.
Calibration: Manufacturer calibrated.
Screening: In accordance with MIL-PRF-55310
, product level B or S, as applicable.
Temperature:
Operating: See table I.
Storage: -62°C to +125°C.
Oscillator load: Standard TTL loads (see table I).
Output waveform: Symmetrical square wave.
2
MIL-PRF-55310/21G
Supply voltage: 5.0 V dc ±10 percent.
Input current: At designated supply voltage (see table I).
Output frequency: Frequency as designated at time of acquisition (see table I).
Output voltage: At designated TTL load (see table I).
Logic 1: 2.4 V dc, minimum.
Logic 0: 0.5 V dc, maximum.
Rise and fall times: See table I.
Duty cycle: See table I.
Initial accuracy at reference temperature (up to 30 days after shipment): See table I.
Initial frequency-temperature accuracy (one-half temperature cycle): Verification applicable. 1
Frequency-temperature tolerance (one-half temperature cycle, referenced to frequency measured at +23°C ±1°C,
immediately prior to starting of the test): See table I. Measurements taken at ten equally spaced increments over
the specified operating temperature range. 1
/
1
/ For the purpose of transitioning this device to MIL-PRF-55310, ‘Frequency stability versus temperature’ has been
renamed ‘Frequency-temperature tolerance’. The verification requirements of ‘initial frequency-temperature
accuracy (one-half temperature cycle)’ shall apply except that frequency measurements shall be referenced to
the frequency measured at +23°C ±1°C (f
) instead of to the nominal frequency (f
ref
nom
/
).
3
MIL-PRF-55310/21G
TABLE I. Dash numbers and operating characteristics.
Dash
number
mA ns percent
01 1.0 MHz to
02 1.0 MHz to
03 1.0 MHz to
11 5.0 MHz to
12 5.0 MHz to
13 5.0 MHz to
21 20.0 MHz to
22 20.0 MHz to
23 20.0 MHz to
Output
frequency
range
5.0 MHz
5.0 MHz
5.0 MHz
20.0 MHz
20.0 MHz
20.0 MHz
60.0 MHz
60.0 MHz
60.0 MHz
Input
current
max at
5.25 V
±1%
/
1
70 15 40 to 60 10 TTL
70 15 40 to 60 10 TTL
70 15 40 to 60 10 TTL
30 15 40 to 60 10 TTL
30 15 40 to 60 10 TTL
30 15 40 to 60 10 TTL
65 5 40 to 60 6 TTL
65 5 40 to 60 6 TTL
65 5 40 to 60 6 TTL
1/ Maximum input current for no load condition. Actual configuration of TTL loads must be added to determine
power supply requirements.
2
/ A TTL unit load is defined as: 1.6 mA sink, 0.04 mA source, and 2 pF capacitance.
Frequency-voltage tolerance: ±4 ppm maximum for a ±10 percent change in supply voltage. Measurements taken
at reference temperature and operating temperature range end points.
Frequency aging: Measurements shall be taken at +70°C ±0.2°C at intervals of not more than every 72 hours for
30 days minimum (see table I).
±10 ppm per year, maximum
±1.5 ppm per 30 days.
±3 ppm per 90 days.
Frequency-environmental tolerance: Not applicable.
Vibration, sinusoidal: In accordance with MIL-PRF-55310
Nonoperating: Test condition G.
Operating: Not required.
Ambient pressure:
Nonoperating: In accordance with MIL-PRF-55310
Operating: Method 105 of MIL-STD-202
Pulse characteristics Frequency-temperature
Rise
and
fall
times
max
Duty
cycle at
1.4 V
Load
max
/
2
Initial
accuracy
ppm
at
+23°C
±1°C
±15 ±10 ±50 ±40 ±25
±25 ±10 ±100 ±75 ±50
±25 ±10 ±200 ±150 ±100
±15 ±10 ±50 ±40 ±25
±25 ±10 ±100 ±75 ±50
±25 ±10 ±200 ±150 ±100
±15 ±10 ±50 ±40 ±25
±25 ±10 ±100 ±75 ±50
±25 ±10 ±200 ±150 ±100
Frequency
aging
ppm/year
after
30 days
tolerance (ppm)
-55°C
to
+125°C
A B C
-55°C
to
+105°C
and method 204 of MIL-STD-202.
.
, test condition C.
-20°C
to
+70°C
4
MIL-PRF-55310/21G
Reflow soldering: Reflow soldering of the unit at +230°C ±10°C for 15 seconds shall not degrade the performance.
Reflow soldering temperatures shall not be applied to the case but to the ribbon leads only.
Part or Identifying Number (PIN): Consists of “M” prefix followed by specification sheet number, a dash and coded
alphas, and numeric number. See example:
EXAMPLE
M55310/21
M prefix and specification sheet number
Product level (S, B, or C)
Dash number (see table I)
Operating temperature range
(A, B, or C) (see table I)
Frequency
Reference documents. In addition to MIL-PRF-55310
MIL-STD-202
The margins of this specification are marked with vertical lines to indicate where changes from the previous issue
were made. This was done as a convenience only and the Government assumes no liability whatsoever for any
inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document
based on the entire content irrespective of the marginal notations and relationship to the last previous issue.
Custodians: Preparing activity:
Air Force - 99 DLA - CC
DLA - CC
(Project 5955-2008-004)
Review activities:
Air Force - 19, 84
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at
http://assist.daps.dla.mil.
, this document references the following:
- S 01 A XXXXXXXX
5
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